I like spools! Sure they're harder on tires and let you know they're there when turning corners, but can't beat the traction. Some people might argue this, but I believe they're better for axles. A locker "can" let one side slip, and so when that tire spinning on the opposite side grabs, somethin might let loose. A spool keeps equal, constant pressure on both axles. Ever noticed how most people breaking axles are using lockers and not spools or arb's?
And I know some people are really going to argue this, but if you're really cheap, it's not that big of a deal to put a spool in the front end, if and only if, you can unlock your hubs. I call it the poor man's arb. I just lock and unlock the driver side hub to turn. It won't turn with it locked in. And if I didn't have the weight of a V8 up front, I'd drag the front tires in reverse.
Yeah, yeah, yeah, everyone says save your money and do it right, but I'm making it work. Let the ridiculing begin.